A YOUNG entrepreneur met David Cameron in London to show off his ‘healthy’ energy drinks which the Prime Minister quipped could sharpen his mind.

Bency Silvester, 22 from Blackburn, said he was a late night learner living off energy drinks while studying for a Mechanical Engineering degree at the University of Salford in 2009, but suffered from the side effects of high sugar and caffeine levels.

He started concocting a drink that would support him using only natural ingredients.

In 2011, he tested Think Drink for the first time and put his studies on hold last year to make it a success.

The company employs five people and Bency was short-listed in the Lloyds TSB Enterprise Awards and a finalist for David Cameron’s 2012 Start Up Hub Competition.

He was invited to 10 Downing Street to a reception celebrating small businesses with the likes of The Apprentice’s Karren Brady and The Dragons’ Den’s James Caan.

After being handed a bottle of Think Drink by Bency and reading the label, Mr Cameron said: “I could use a Think Drink to sharpen my mind.”

Bency said: “After the PM’s positive response to my Think Drink I’m planning to supply the whole cabinet with free Think Drink as in these tough times a sharper thinking government has to be good for the country.”

Think Drink contains a herb called Guarana, which is used to enhance alertness, alleviate fatigue and provide a boost.

Bency said Think Drink contains no added sugars, artificial colourings, flavourings or preservatives.

Steve Grime, who has advised Bency as he prepares to launch his product into the market, said: “To have done what he's done is amazing. He should make Blackburn proud.”

Bency said his inspiration came from businessmen like Richard Branson and Steve Jobs.

“People who have gone from having nothing to being at the forefront of their industries,” he added.

Think Drink will be available to buy in shops next month with conversations ongoing with national distributors.